Email Inbox API + Sending by Sendmux for ChatGPT

io.github.sendmux/sendmux-mcp

AI email inbox and sending tools with attachments, search, live events, and webhooks.

client:ChatGPT transport:streamable-http runtime:pypi

Install Email Inbox API + Sending by Sendmux in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://mcp.sendmux.ai/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs